On Sat, 1 Feb 2020 12:24:24 -0600, you wrote: >Hmmm. I do not have any of that equipment, but I do know the RS232 >interface pretty well. It may be that you need to cross over the >connections with RX and TX. Do you have a null modem type device handy? The GPSDO says it only needs send and receive data; no handshake. I've got a break-out adapter in the line passing only those and ground. Reversing t/r doesn't help. Gonna scope the interface chip's ins/outs, but right now the cellar hamshack/shop/man cave is just too (*^&*%* cold!
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